Yeedercar Handcrafted Dry Carbon Fiber Rear Diffuser for Audi A4 B9 Line S4 Sedan 4-Door (2020-2022)
$550.00 Original price was: $580.00.Current price is: $550.00.
Rear Diffuser in Dry Carbon Fiber for the Audi A4 B9 Line S4 Sedan 4-Door (2020-2022). Made to order, ships worldwide with a 12-month warranty.
This rear diffuser finishes the rear of the Audi A4 B9 Line S4 Sedan 4-Door (2020-2022) with a deeper, vented profile.
Dry carbon fiber construction, noticeably lighter than wet layup, finished with a UV-stable clear coat.
Fits: Audi A4 B9 Line S4 Sedan 4-Door (2020-2022).
The mounting tabs line up with the factory rear bumper points on the Audi A4 B9 Line S4 Sedan 4-Door.
Compare the shape in the photos with your bumper first – bumper variants within the same model year can differ.
Clean with a pH-neutral car shampoo and avoid machine polishing the edges.
Made to order in our workshop, typically 10-15 business days before shipping worldwide with tracking. 12-month warranty against manufacturing defects.
FAQs
Will this rear diffuser fit my Audi A4 B9 S4?
It matches the rear bumper shown in the gallery for 2020-2022. Compare the valance shape in the photos with your own bumper first.
Is the carbon real?
Yes – dry carbon fiber with a UV-stable clear coat. Not a hydro-dipped or printed finish.
Do I need to cut the rear bumper?
No. It replaces the factory lower valance section and uses the original mounting points.
Does it come with fittings?
The piece itself is supplied as shown; the factory fixings on your car are reused. Tape or sealant is recommended by most installers.
What if it arrives damaged?
Send us photos within 7 days and we will replace it. Every piece carries a 12-month warranty against manufacturing defects.
| Material | Dry Carbon Fiber |
| Fitment | Audi A4 B9 Line S4 Sedan 4-Door (2020-2022) |
| Part Type | Rear Diffuser |
| Finish | UV-stable Clear Coat |
| Installation | Direct Fit to Factory Mounting Points |
| Production Time | 10-15 Business Days (Made to Order) |
| Warranty | 12 Months |
| Stock Status | Made to Order |
| Brand | Yeedercar |
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